Tropospheric aerosols

A) have residence time of at least several centuries.
B) have the net effect of reducing global temperatures.
C) form a positive feedback loop with increasing atmospheric carbon dioxide.
D) are rarely anthropogenic in origin.


Answer: B

Environmental & Atmospheric Sciences

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Sylvia Earle is leading a campaign called Mission Blue to finance research and to ignite public support for a global network of marine protected areas, which she dubs ____.

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